Carbon: Fix context switch after window has been deleted (fixes CONTEXT_SHARE).
Carbon: Fix context switch after window has been deleted (fixes
CONTEXT_SHARE).

niklaskorz/pyglet,niklaskorz/pyglet,niklaskorz/pyglet,seeminglee/pyglet64,adamlwgriffiths/Pyglet,seeminglee/pyglet64,adamlwgriffiths/Pyglet,niklaskorz/pyglet,seeminglee/pyglet64,adamlwgriffiths/Pyglet,adamlwgriffiths/Pyglet